source: palm/trunk/SOURCE/init_pt_anomaly.f90 @ 2000

Last change on this file since 2000 was 2000, checked in by knoop, 5 years ago

Forced header and separation lines into 80 columns

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1!> @file init_pt_anomaly.f90
2!------------------------------------------------------------------------------!
3! This file is part of PALM.
4!
5! PALM is free software: you can redistribute it and/or modify it under the
6! terms of the GNU General Public License as published by the Free Software
7! Foundation, either version 3 of the License, or (at your option) any later
8! version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2016 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22! Forced header and separation lines into 80 columns
23!
24! Former revisions:
25! -----------------
26! $Id: init_pt_anomaly.f90 2000 2016-08-20 18:09:15Z knoop $
27!
28! 1682 2015-10-07 23:56:08Z knoop
29! Code annotations made doxygen readable
30!
31! 1353 2014-04-08 15:21:23Z heinze
32! REAL constants provided with KIND-attribute
33!
34! 1322 2014-03-20 16:38:49Z raasch
35! REAL constants defined as wp_kind
36!
37! 1320 2014-03-20 08:40:49Z raasch
38! ONLY-attribute added to USE-statements,
39! kind-parameters added to all INTEGER and REAL declaration statements,
40! kinds are defined in new module kinds,
41! revision history before 2012 removed,
42! comment fields (!:) to be used for variable explanations added to
43! all variable declaration statements
44!
45! 1036 2012-10-22 13:43:42Z raasch
46! code put under GPL (PALM 3.9)
47!
48! 861 2012-03-26 14:18:34Z suehring
49! Modification of the amplitude to obtain a visible temperature perturbation.
50!
51! Revision 1.1  1997/08/29 08:58:56  raasch
52! Initial revision
53!
54!
55! Description:
56! ------------
57!> Impose a temperature perturbation for an advection test.
58!------------------------------------------------------------------------------!
59 SUBROUTINE init_pt_anomaly
60 
61
62    USE arrays_3d,                                                             &
63        ONLY:  pt, zu
64
65    USE grid_variables,                                                        &
66        ONLY:  dx, dy
67
68    USE indices,                                                               &
69        ONLY:  nbgp, nx, nxl, nxr, nyn, nys, nzb, nzt
70       
71    USE kinds
72
73    IMPLICIT NONE
74
75    INTEGER(iwp) ::  i  !<
76    INTEGER(iwp) ::  ic !<
77    INTEGER(iwp) ::  j  !<
78    INTEGER(iwp) ::  jc !<
79    INTEGER(iwp) ::  k  !<
80    INTEGER(iwp) ::  kc !<
81   
82    REAL(wp)     ::  betrag !<
83    REAL(wp)     ::  radius !<
84    REAL(wp)     ::  rc     !<
85    REAL(wp)     ::  x      !<
86    REAL(wp)     ::  y      !<
87    REAL(wp)     ::  z      !<
88   
89!
90!-- Defaults: radius rc, strength z,
91!--           position of centre: ic, jc, kc
92    rc =  10.0_wp * dx
93    ic =  ( nx+1 ) / 2
94    jc =  ic
95    kc =  nzt / 2
96
97!
98!-- Compute the perturbation.
99    DO  i = nxl, nxr
100       DO  j = nys, nyn
101          DO  k = nzb+1, nzt
102             x = ( i - ic ) * dx
103             y = ( j - jc ) * dy
104             z = ABS( zu(k) - zu(kc) )
105             radius = SQRT( x**2 + y**2 + z**2 )
106             IF ( radius <= rc )  THEN
107                betrag = 5.0_wp * EXP( -( radius * 0.001_wp / 2.0_wp )**2 )
108             ELSE
109                betrag = 0.0_wp
110             ENDIF
111
112             pt(k,j,i) = pt(k,j,i) + betrag
113
114          ENDDO
115       ENDDO
116    ENDDO
117
118!
119!-- Exchange of boundary values for temperature
120    CALL exchange_horiz( pt, nbgp )
121
122
123 END SUBROUTINE init_pt_anomaly
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